Why the odd metal bearing seal? - pics..

Taken apart a Mavic Crossmax ST 29er freehub and pushed out two of these 6803RS bearings, on the side that faces out they have a shiny metal seal and not the usual rubber lipped black metal one that the other side has.

When I get the new ones from from ebay (Kaese on here) should I whip out one rubber and replace with the metal?